Floor Joist Span Deck Span Chart

Floor joist span tables for various sizes and species of wood.

Floor joist span deck span chart.

As a rule the larger the deck the larger the joists. Deck joists have a different maximum span length depending upon the size spacing and framing material that you re creating your deck with. The deck joist span chart below is based on the updated codes from the international residential code 2015 which for the first time specifically addressed these deck design considerations. In typical deck construction with a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above.

A double 2x12 beam can span 12 feet. Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. A 2 2x10 can span 10 feet and so on. The numbers in gray indicate the distance between the support posts.

Span calculator for wood joists and rafters also available for the android os. Ready to start calculating how much lumber you ll need for your joists. Deck beam span table deck joist span table deck joist rule of thumb deck porch construction structural fasteners deck porch post beam connectors. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.

For best results refer to our wood and composite deck joist span table. Plus unlike floor joists decks needs to be able to support the extra weight of pressure treated wood handrails as well as snowfall during winter. Also available for the android os. Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span.

But you ll notice when you look at the portion of the span table for joists with cantilevers that the joist span for decks with a cantilever is often less than the span for the same sized joist without cantilevers. Steel post cap connectors plywood post to beam cleats other connectors deck porch railings code requirements safety deck framing tables codes specifications questions answers about allowable spans for deck floor or porch framing. When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches. The larger the deck the larger the joists.

To learn more about deck joist sizing spacing and allowable span reference this chart. Section r507 5 notes that deck joists can cantilever up to 1 4 of the joist span.